Division of Removable Prosthodontics, Fukuoka Dental College, Fukuoka, Japan.
Gerodontology. 2012 Jun;29(2):e1086-91. doi: 10.1111/j.1741-2358.2012.00616.x. Epub 2012 Jan 20.
This study investigated the fracture resistance of maxillary acrylic resin complete dentures subjected to long-term water immersion.
Maxillary acrylic resin complete dentures were fabricated from five denture base resins. Half of the dentures were stored in water for 50 h, and the other half were kept in water for 180 days before testing. Ten specimens were fabricated per group. The flexural load at the proportional limit (FL-PL) of the dentures was tested.
A two-way anova revealed a significant difference in FL-PL because of the denture base material variable. There were no significant differences in FL-PL because of the effect of water immersion and the interaction between the effect of water immersion and the denture base material. The FL-PLs of the dentures fabricated with the two conventional heat-processed resins, the pour-type autopolymerizing resin and the microwave energy-processed resin were not significantly different from each other; they were significantly higher than the light-activated resin in regard to their FL-PL.
The FL-PLs of the maxillary acrylic resin complete dentures did not change after long-tern water immersion, and the FL-PL of the denture fabricated from the light-activated resin was lower than those of the other materials.
本研究调查了长期浸水对上颌丙烯酸树脂全口义齿抗折能力的影响。
由五种义齿基托树脂制作上颌丙烯酸树脂全口义齿。一半义齿在水中储存 50 小时，另一半义齿在水中储存 180 天后进行测试。每组制作 10 个样本。测试义齿的比例极限弯曲载荷（FL-PL）。
双因素方差分析显示，由于义齿基托材料的变化，FL-PL 存在显著差异。由于浸水的影响以及浸水与义齿基托材料之间的相互作用的影响，FL-PL 没有显著差异。用两种传统的热加工树脂、注压自凝树脂和微波能加工树脂制作的义齿的 FL-PL 没有显著差异；与光固化树脂相比，它们的 FL-PL 显著更高。
长期浸水后上颌丙烯酸树脂全口义齿的 FL-PL 没有变化，光固化树脂制作的义齿的 FL-PL 低于其他材料。
